Marking-machine.



F. J. MARTIN. MARKING MACHINE. APPLICATION FILED MAY 15. 1915- Patented Apr. 9,1918.

3 SHEETS-SHEET l J m @UT i xwww MN, P W Q N j Mka Qfi 1" E Q %\E lnl u h F uuun W lli a s Q .8- SIp 63 IN VENTOR. fim

WITNESS ATTORNEYS.

F. J. MARTIN. MARKING MACHINE.

APPLICATION FILED MAYI5, 191a.

Patented Apr. 9,1918.

3 SHEETS-SHEET 2 WQQ WITNESS A TTORNE YS.

F. 1. MARTIN. MARKING MACHINE. APPLICA'lTlON FILED MAYI5, Isms.

Lfifiz ze Patented Apr. 9,1918.

3 SHEETS-SHEET 3- IN VEN TOR.

ATTORNEYS.

FRANK J. MARTIN, 0F GREENZEIELD, MASSACHUSETTS.

MARKING-MACHINE.

Specification of Letters Patent.

Patented Apr. 9, 1918;.

Application filed May 15, 1916. Serial No. 97,632.

To all whom it may concern:

Beit known that I, FRANKJ. MARTIN, a citizen of the United States of America, residing at Greenfield, inthe county of Franklin and State of Massachusetts, have invented certain new and useful Improvements in h'larking-Machines, of which the following is a specification. )1

This invention relates to marking machines, such as are used for imprinting names, symbols, size numbers, and the llke on articles of various shape. 7

Such machines have been used heretofore and generally comprise as essential elements a reciprocable work carrying table and a reciprocable slide, carrying a marking tool. The slide and table are arranged to move at right angles to each other; first toward one another so that work on the table is forced against the marking tool while the latter traverses the work, and then away fromone another to permit marked work to be removed and unmarked work to be placed on the table. Machines of this class have heretofore been mechanically operated by a rather elaborate arrangement of cams, gears, levers and links, and are, on account of such construction, expensive to manufacture. More particularly, they are difiicult to adjust to secure the various ranges of travel of the slide and table and the various pressures of the table on the work, which are necessary to meet the varying conditions of different classes of work. A further objection to the mechanical operation lies in its unyielding actuation of the slide and work carrying table. Forexample, assuming that the latter is adjusted for a given class of work, it will travel the correct distance for perfect pieces in that class, but, if some pieces are slightly oversize or undersize, the travel of the table will be the same as before with the possible result of breakage in the first case due to the excessive pressure or in the second case of insufiicient marking due to the insuflicient pressure. These disadvantages are avoided by themachine which is the subject matter ofthis invention.

An object of tiis invention is to provide in a niarking machine, involving a reciprocable tool carrying slide. and a work carrying table, reciprocable at right angles to the slide, hydraulic vmeans to actuate said slide and table which is particularly characterizedby a uniform pressure of the work against the tool irrespective of irregularities in the former.

Another object of the. invention is to pro vide in a marking machine, a hydraulically actuated marking slide and a similarly. operated work carrying table together with improved mea ns to vary the pressure of the given travel occur at various positions relatively to the table.

Other objects and advantages will appear in the detailed description to follow and in the appended claims.

For the purpose of illustrating one manner in which the invention may be practised,

a single preferred embodiment thereof is illustrated in the accompanying drawings,

in. which,-

Figure lis a front elevational view ofthe complete machine showing the general arrangement of parts withcertain members shown in conventional form only;

Fig. 2 is a sectional elevation taken onthe line 2-2 of Fig. 1 and looking in the direction of the arrows;

Fig. 3 is a sectional plan view of a part of the marking slide and is taken on the line 3-3 of Fig. 1 looking in theidirection of the arrows;

Fig. 4; is a rear elevational view of the valve mechanism and controlling devices therefor;

Fig. 5 is an end elevational view of Fig. 4-;

Fig. 6 is an elevational View showing in diagrammatical form a part of the reversing mechanism for the valve;

Figs. 7 and 8 are sectional views taken on the lines 77 and 88, respectively, of Fig. 5 and looking in the direction of the arrows;

Fig. 9 isa? sectional view taken on the moving the Referring to these drawings in detail and particularly to Figs. 1 and 2, the frame of the machine comprises a hollow from the pedestal by side members C. The several members A, B, and C are preferably integral parts of a single casting. Slidably mounted on the front face of pedestal A is a table 1 which is adapted to support the work to'be marked. in line with table 1 and disposed near the base of the machine is a cylinder 2 having a piston 3 therein which is connected by a rod 4; with the table 1. The upper end'of rod & is threaded into table 1 and nuts 5 on the rod below the table provide means for varying the height of table 1 within limits as desired. v

The head B is recessed to receive a slide 6 which is held thereto by suitable gibs 7, as shown in Figs/1 and 2. Slide 6 carries a marking tool which may be of any of the well known forms, such as the roll die 8, indicated conventionally in Fig. 1. The tool I 8' is adapted to be moved horizontally across the work to be marked which is supported upon and forced into contact with tool 8 by the vertically movable table 1. The slide 6 is of square cross sectlonal shape, as shown in Fig. 2, and fiat plates 9 are secured to the vertical sides thereof which plates extend above slide 6 and support therebetween a plurality of rolls 10 to engage the head 13. Fitted within one end of slide 6, as best shown in Fig. 3, is a sleeve 11 which is closed at the outer end by a cap 12. A piston 13 within sleeve; 11 is sta'tionarily held by pipes 14: and 15 which connect the piston with a bracket D secured to head B. Cap 12 has a suitable stuffing box therein through which pipes 14 and 15 pass so that sleeve 11 and thus slide 6 can move relatively to piston 13 and thus the frame of the machine. The inner pipe 15 opens at one end into sleeve 11 on the left side of piston 13 while the outer pipe 14 is closed at one end by piston 13 and has several holes 16 therein which communicate with sleeve 11 to the right of the piston. The other ends of pipes 14 and 15 c01nmunicate with cored passages 17 and 18 which pass downwardly through bracket D and connect with pipes 20 and 19, respectively. 7

Supported within pedestal A is a valve 21 which is indicated in Fig. 1 only in a general way sufficient to disclose its relation with the other parts of the machine. Its

. construction is, however, fully shown in Figs. 1, 5, 7, 8, and 9 to which reference is now made. The valve 21 has four tapped openings arranged at r1ght angles to one anpedestal A, and a head 13 supported in spaced relation other which are adapted to receive pipe connections as will appear. Rotatable in a closed central interior chamber 22. of the valve is a plate 23 having an integral rod extension 21 which passes out through a stuffing box formed in the cover plate 25 and is adapted to be actuated by means tojbe described. Plate 23 has a single slot 26 therein which may register with either of two slots 27 and 28 formed in the base of the valve or it may lie between said slots in neutral position, as shown in Fig. 7. Diametrically opposite slot 26, a recess 29 is formed in plate 23 facing the base of the valve. This recess ,may connect either of ports 30 and 31 with a port 32, all formed in the base of the valve, or it may simply overlie port 32 and close off ports 30 and 31 therefrom. Ports 27 and 30 are connected together and to pipe 19, heretofore mentioned, by a cored passage 33. Ports 28 and 31 are similarly connected b a passa e to nine 20 heretofore men- 1 b l l tioned. The port 32 is connected, as shown in Fig. 9, to an exhaust pipe and a supply pipe 36 enters the valve 21 diametrically opposite from pipe 35 and leads to chamber 22 above the plate 23, as clearly shown in Fig. 9; It will be obvious that, when plate 23 is swung counterclockwise from its neutral position shown, liquid supplied to chamber 22 will pass through the registering ports 26 and 27 and out through pipe19 since no other exit is provided as plate 23 closes off port 30. At the same time, ports 31 and 32 will be connected by the recess 29 so that liquid in pipe-20 may pass to exhaust pipe 35. When plate 23 is moved in a clockwise direction until ports 26 and 28 register,

liquid is supplied to pipe 20 and exhausted from pipe 19 in an analogous manner.

Referring to-Figs. 1 and 2, a supply tank 37 is located within pedestal A near the base thereof to receive oil or other suitable fluid. for actuating the slide 6 and table 1. Above tank 37 and connected therewith a pipe 38 is a gear pump 39 which is adapted to be driven from a suitable source of power by a belt 40. interposed in pipe 38 is a check valve tl which permits upward flow through the pipe only, and at thebase of the pipe-an intake strainer These parts, each well known, have been represented in conventional form. Pump 39 draws oil from tank 37 and forces it through pipe36 to the valve 21 and check valve 11 prevents'the .oil drawn into pipe 38' from passing back again to tank 37. The exhaust pipe 35 leads to the latter, as shown in Figs. 1 and '2, so that the oil used in the cylinders is redelivered to the tank to be used over again. interposed in pipe 19 is an ordinary globe valve 12", where by the flow of oilthrough the pipe may be varied as desired for a reason later to appear. Pipe 36 also has a suitable gage 13 connected thereto, whereby the pressure in the system may be indicated in the usual manner. A by-pass pipe 44 connected at one end with pipe 36 by a, relief valve 45 is connected at its other end to the inlet of pump 39; This relief valve may be of any of the usual commercial types and one suitable form is shown in Fig. '10 for illustrative purposes. A spring pressed valve 46 normally closes off" the connection between pipes 36 and 44, but,assoon as the pressure in'the former becomes greater than the force exerted'by the spring, valve 46 opensand permits the fluid to'pass into pipe 44 andthus to the inlet of pump 39. The pressure on the latter is thereby eased up by the circulation around the by-pass-pipe 44 in anobvious manner. The tensionof the valve spring may be regulated by the hand wheel shown in Fig. 10 in an obvious manner, and this hand wheel extends without pedestal A, as shown in Figs. 1 and 10 for convenient operation. The pipes 19 and 20 lead to the sleeve 11 on opposite sides of piston 13, as already described,-and pipes 57 and 58, respectively, lead'from these pipes to cylinder 2 on opposite sides of piston 3, as shown in Figs. 1 and 2. The pressure regulating means is particularly important because by it the pressure between the tool and work is maintained at the desired constant.

The means for operating the valve 21 will. now be described. Fixed on operating rod 24 of the valve isv a lever 47 (Figs. 4 and 5) which is movable between spaced adjustable stops 48. A latch 49 pivotedat 50 to the valve casing normally holds the lever 47 fIOIlI upwardmovement. Latch 49 is 0011- nected by a link 5l (Fig. 2) to a lever 52 ona shaft 53 which extends entirely across pedestal A, as indicated in Fig. l.

A foot lever 54- (indicatedby dotted linesin Fig. 2 since it-lies to theright ,of line 2'2 in Fig. I) is fixed on shaft-53 and has a portion extending without the pedestal for convenient operation. A pressure on lever 54 will swing lever 52 in a counterclockwise direction and move latch 49 to release arm 47. Latch 49 moves back into arm engaging position when foot lever 54 is released by reason of a spring 55 (Fig. 2) which connects the lever 52 to a suitable fixed part, as indicated in Fig. 2.

The means for moving arm 47 will next be described with particular reference to Figs. 1, 2, and6. Adjustably held in a T-slot 59 in slide 6 arespaced stops 60 and 61 and mounted in head B below slide 6 is a shaft 62 having a lever 63 fixed thereon, a portion of which lies-between and in the path of stops 60 and 61, as shown in Fig. 1. ixed' on shaft 62 is an arm'64 which is connected bya link 65 to arm 47, as indicated in Fig. 4. Much of the detail in Fig. 1, however, has been omittedto avoidconfusion of lines owing to thesmallsca-le to which this figure For example, arm 47 is merely 51 is purposely shown as the latch 49 isentirely mounted in a' casing 67 secured to-head B. To effectively show lever 62, arm 64, and cam 66 in their correct relative positions, a diagrammaticalshowing of these 'parts'has been made in Fig. 6 to whichrcference is now made. It will be seen from thisiigure, that cam 66 is provided with apoint which nor' mally bears on a spring pressed roll 68 slightly above the line of centers connecting the roll and shaft'62.

The operation of the machine will'now be described. Assuming that the stop's 60 and 61 have been set to obtain the desired travel of tool 8 and that nut 5 have been moved to raise table 1 to its desired height (the stroke of the table being constant), work to be marked is placed on the table, and the operator depresses foot lever 54 which releases latch 49. Arm 47, thus released is drawn upwardly by link 65 and lever'64, and the latter is moved by the action of spring pressed'roll 68 against the under side of cam 66. The latter having merely a point contact with the roll is in unstable equilibrium and has a tendency to move upwardly since its contact with the roll is purposely arrangeda trifle above center, as stated.- Lever 63 is incidentally thrown slightly to the right, as indicated in dotted lines in Fig. 6. counterclockwise direction, as viewed in Figs. 7 and 8, so that oil is admitted to pipe 19' and exhausted from pipe 20. ingly oil is forced into sleeve 11 to the left of piston 13 and into cylinder 2 below piston 3S0 that the slide 6 travels to the left and table 1 with the work moves upv ardly. The work is thus forced against tool 8 as the latter is moved thereacross, and the de sired marking ofthe work is obtained in the usual manner. As slide 6'-cont inues on its movement to'the left as viewed inFig. 1, stop 61 engages lever 63 and swings it'to the left which forces the point ofcam 66 below roll 68 and rocks arm 47 of the valve in a clockwise direction, as viewed in Figs.

- 4, 7, and 8. The supply to pipes 19; and 57 particular detail is, however,

The actuation of arm 47 is in. a

Accord stop 60 engages lever 63 and swings it in a clockwise direction until it lies in the vertical position, as shown in Fig. 1. Further movement of the lever is prevented since arm l7 which is moved therewith comes up against the under surface of latch 49. Thus the parts are left in neutral position, as shown, and the machine comes to rest. If other than one cycle of operation, as described, is desired, it may be obtained by holding lever 54 down so that latch 4:9 cannot engage arm 47, as the latter passes from its lower to its upper position.

The valve 42 permits regulation of the speed of slide 6 by controlling the quantity of oil which passes therethrough. As the slide travels to the left, the oil forced from sleeve '11 through pipe 20 is throttled and, as the slide 6 travels to the right, the supply to sleeve 11 is throttled, whereby the speed of the slide may be regulated as de sired. The relief valve L5 is used to vary the pressure on table 1 by varying the tension of the valve spring so that the pressure will not exceed a given and predeterminable amount. The travel of the slide may be varied in an obvious manner by moving stops 60 and 61, and, if desired, the travel of the slide may be made to occur unsymmetrically with the center line of table 1 to adapt itself to the particular class of work in hand. The slide heretofore used has generally been reciprocated by a crank of adjustable throw and a connecting rod. Obviously, with this arrangement, the travel of the slide may be varied but not in as convenient manner as with the structure disclosed. However, the travel must needs be equal on either side of the center line of the table unless the latter or the crank shaft is moved the one relatively to the other. The crank and connecting rod method of operation, moreover, is by-no means smooth in operation nor is its speed uniform as is obtained by the structure herein described.-

The invention has been described in a preferred form for the purposes of illustration, but the invention is defined in its proper scope by the appended claims rather than by the "foregoing description.

What I claim is 1. A marking machine, comprising, a reciprocable tool carrying slide, a reciprocable work supporting table, said slide and table arranged to move at right angles to one another, hydraulic means to simultaneously actuate said slide and table and means to maintain the pressure of the table on the work constant, all constructed and arranged so that the work to be marked is brought against said tool with a constant pressure regardless of size variations in the work.

'2. A marking machine, comprising, a reciprocable tool carrying slide, a reciprocable table adapted to support work to be marked,

uniform pressure irrespective of irregu-- said slide and table arranged to move in rectangular relation, means to simultaneously move said slide and table to bring the work on the latter into engagement with the tool on the former, and means to maintain the pressure of the table on the work constant, including means to vary said pressure, all constructcd and arranged so that the work is forced against the tool with a larities in the work.

3. A marking machine, comprising, areciprocable tool carrying slide, a reciprocable table arranged to move in rectangular relation with said slide and adapted to support work to be marked, hydraulic means to simultaneously actuate said slide and table to force the work against the tool as the latter moves across the former, a valve associated with said means, and means controlled by the travel of said slide to actuate said valve and reverse the motion of the slide and table. V 1

4:. A marking machine, comprising, a reciprocable tool carrying slide, a reciprocable work carrying table arranged to move in rectangular relation to the slide, hydraulic means to simultaneously actuate the slide and table to force the work against the tool as the latter travels across the former, a valve associated with said means, and means controlled by the travel of the slide to actuate the'valve to reverse the motion ofthe slide and table, said last-named means being adjustable to vary the travel of the 1 slide and constructed and arranged so that the travel may be varied without disturbing its operating means and so that uniform travels of the slide may be made to occur at various parts of the table. I 1

5. A marking machine, comprising, a reciprocable marking slide, a reciprocable work supporting table arranged to travel at right angles to the slide, hydraulic means to simultaneously move the slide and table and 11 a controlling device adapted for manual operation and arranged to permit one complete cycle of operation of said slide and table, whereby the work may be forced against the slide, as the latter moves across the 115 former in one direction and the work is withdrawn from the slide as it moves across the work in the other directlon.

6. A marking machine, comprising, a

frame, a tool carrying slide reciprocable in 0 said valve to reverse the motion of the slide and table and means controlled by the travel of said slide to actuate said valve to stop the slide and table.

7. A marking machine, comprising, a frame, a table supported for vertical reciprocating movements thereby, a marking slide supported above the table for horizontal reciprocatory movements, a cylinder formed in said slide, a piston in the cylinder and stationarily held by said frame, a second cylinder, a piston therefor connected to said table, a valve adapted when moved in one direction to supply fluid under pressure to said cylinders to move the slide and table toward one another and, when moved in the Copies of this patent may be obtained for five cents each, by addressing the other direction, to move the slide and table away from one another, said valve adapted to be moved to an intermediate position to cut off the supply to said cylinders, releasable mechanism normally holding said valve in its intermediate position including a device to move the valve to its first-named position when said mechanism is released, means controlled by the movement of the slide in one direction to move the valve to the second named position, and means controlled by the movement of the slide in the other direction to move the valve into its intermediate position, whereby it may be held by said mechanism.

FRANK J. MARTIN.

Commissioner of Patents,

Washington, D. G. 

